Why you should use iOS (Swift) Online Test?

The iOS Online Test makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects: Ability to write clean and efficient Swift code Knowledge of iOS app development using Swift Proficiency in using views and controllers in iOS applications Understanding of variables and data types in Swift Experience with control flow statements in Swift Expertise in creating and using functions in Swift Familiarity with arrays and collections in Swift Understanding of optionals and their usage in Swift Knowledge of creating and working with classes and objects in Swift Proficiency in memory management techniques in iOS development Ability to handle errors and debug Swift code

iOS (Swift) Online Test

Q: What topics are covered in the iOS (Swift) Online Test?

Swift Programming iOS Basics (Swift) Views and controllers Variables and Data Types Control Flow Functions Arrays and Collections Optionals Classes and Objects Memory Management Error handling and debugging Networking Core Data Testing and Debugging

About the test:

The iOS Online Test uses scenario-based MCQs to evaluate candidates on their proficiency in developing iOS mobile applications, including their knowledge of Swift programming language, UIKit, Core Data, Auto Layout, memory management, and debugging. The test includes a coding question to evaluate hands-on programming skills and aims to assess a candidate's ability to design and develop iOS mobile applications that adhere to industry best practices and standards.

Covered skills:

Swift Programming
Views and controllers
Control Flow
Arrays and Collections
Classes and Objects
Error handling and debugging
Core Data

iOS Basics (Swift)
Variables and Data Types
Functions
Optionals
Memory Management
Networking
Testing and Debugging

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9 reasons why

Adaface iOS (Swift) Test is the most accurate way to shortlist iOS Developers

Reason #1

Tests for on-the-job skills

The iOS (Swift) Online Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

Proficient in Swift Programming to develop iOS applications
Solid understanding of iOS Basics (Swift)
Ability to design and implement Views and controllers in iOS
Knowledge of Variables and Data Types in Swift
Capable of implementing Control Flow in Swift
Skilled in writing and using Functions in Swift
Ability to work with Arrays and Collections in Swift
Familiarity with Optionals in Swift
Understanding of Classes and Objects in Swift
Knowledge of Memory Management in iOS
Experience in error handling and debugging in iOS
Understanding of Networking in iOS
Familiarity with Core Data in iOS
Ability to perform Testing and Debugging in iOS

Reason #2

No trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

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The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface

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Reason #3

Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

These are just a small sample from our library of 10,000+ questions. The actual questions on this iOS Online Test will be non-googleable.

🧐 Question
Medium Completion Handlers Views Animations	Solve
Consider the following iOS (Swift) code snippet: What will happen when this view controller appears? A) The squareView will move 100 points to the right instantly and then change its background color to blue. B) The squareView will not move, and its background color will not change. C) The squareView will change its background color to blue instantly and then move 100 points to the right over 1 second. D) The squareView will move 100 points to the right and change its background color to blue simultaneously over 1 second. E) The squareView will move 100 points to the right over 1 second, and the background color will change to blue after 1 second.
Medium UI Responder Chain UI Views Interaction.	Solve
Consider the following iOS (Swift) code snippet: When the user taps on the CustomButton, what will be the output? Note that UIButton is a subclass of UIControl by default. A) Only "CustomButton touchesBegan" will be printed. B) "CustomButton touchesBegan" and "CustomView touchesBegan" will be printed. C) "CustomButton touchesBegan", "CustomView touchesBegan", and "ViewController touchesBegan" will be printed. D) "CustomButton touchesBegan" and "ViewController touchesBegan" will be printed. E) No output will be printed.
Medium ViewController Buggy Code	Solve
Here's two different ways to write the same code in iOS (Swift): Which of the following statements are correct?
Medium Data Provider DispatchQueue Closures Asychronous operations.	Solve
Consider the following code snippet: What will be printed after the code execution?
Medium Property Observers OOPs	Solve
Consider the following Swift code snippet: What does the code print after execution? A) 800, -100, 80, 80 B) 800, 800, 80, 72 C) 1000, 800, 100, 72 D) 800, 800, 80, 80 E) 800, 0, 80, 80
Medium Class Destructor OOPs	Solve
What does the following Swift code output?
Easy Defer blocks	Solve
What does the following Swift code output?
Easy Lazy Variables	Solve
What does the following Swift code output?
Easy Registration Queue Logic Queues	Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount. For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition. ⚠️⚠️⚠️ Note: - The first line of the input is the length of the array. The second line contains all the elements of the array. - The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function. - You need to "print" the final result (not return it) to pass the test cases. For the example discussed above, the input will be: 5 20 70 -40 30 -10 Your code needs to print the following to the standard output: 20 70 30 -40 -10
Medium Visitors Count Strings Logic	Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. Example: Input: WWMMWWCCC Expected Output: 4W3C2M Explanation: ‘W’ has the highest count, then ‘C’, then ‘M’. ⚠️⚠️⚠️ Note: - The input is already parsed and passed to a function. - You need to "print" the final result (not return it) to pass the test cases. - If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’. - If any of them have the same count, the output should follow this order - M, W, C.

	🧐 Question	🔧 Skill
	Medium Completion Handlers Views Animations	2 mins iOS	Solve
Consider the following iOS (Swift) code snippet: What will happen when this view controller appears? A) The squareView will move 100 points to the right instantly and then change its background color to blue. B) The squareView will not move, and its background color will not change. C) The squareView will change its background color to blue instantly and then move 100 points to the right over 1 second. D) The squareView will move 100 points to the right and change its background color to blue simultaneously over 1 second. E) The squareView will move 100 points to the right over 1 second, and the background color will change to blue after 1 second.
	Medium UI Responder Chain UI Views Interaction.	3 mins iOS	Solve
Consider the following iOS (Swift) code snippet: When the user taps on the CustomButton, what will be the output? Note that UIButton is a subclass of UIControl by default. A) Only "CustomButton touchesBegan" will be printed. B) "CustomButton touchesBegan" and "CustomView touchesBegan" will be printed. C) "CustomButton touchesBegan", "CustomView touchesBegan", and "ViewController touchesBegan" will be printed. D) "CustomButton touchesBegan" and "ViewController touchesBegan" will be printed. E) No output will be printed.
	Medium ViewController Buggy Code	3 mins iOS	Solve
Here's two different ways to write the same code in iOS (Swift): Which of the following statements are correct?
	Medium Data Provider DispatchQueue Closures Asychronous operations.	3 mins Swift	Solve
Consider the following code snippet: What will be printed after the code execution?
	Medium Property Observers OOPs	2 mins Swift	Solve
Consider the following Swift code snippet: What does the code print after execution? A) 800, -100, 80, 80 B) 800, 800, 80, 72 C) 1000, 800, 100, 72 D) 800, 800, 80, 80 E) 800, 0, 80, 80
	Medium Class Destructor OOPs	2 mins Swift	Solve
What does the following Swift code output?
	Easy Defer blocks	2 mins Swift	Solve
What does the following Swift code output?
	Easy Lazy Variables	2 mins Swift	Solve
What does the following Swift code output?
	Easy Registration Queue Logic Queues	30 mins Coding	Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount. For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition. ⚠️⚠️⚠️ Note: - The first line of the input is the length of the array. The second line contains all the elements of the array. - The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function. - You need to "print" the final result (not return it) to pass the test cases. For the example discussed above, the input will be: 5 20 70 -40 30 -10 Your code needs to print the following to the standard output: 20 70 30 -40 -10
	Medium Visitors Count Strings Logic	30 mins Coding	Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. Example: Input: WWMMWWCCC Expected Output: 4W3C2M Explanation: ‘W’ has the highest count, then ‘C’, then ‘M’. ⚠️⚠️⚠️ Note: - The input is already parsed and passed to a function. - You need to "print" the final result (not return it) to pass the test cases. - If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’. - If any of them have the same count, the output should follow this order - M, W, C.

	🧐 Question	🔧 Skill	💪 Difficulty	⌛ Time
	Completion Handlers Views Animations	iOS	Medium	2 mins	Solve
Consider the following iOS (Swift) code snippet: What will happen when this view controller appears? A) The squareView will move 100 points to the right instantly and then change its background color to blue. B) The squareView will not move, and its background color will not change. C) The squareView will change its background color to blue instantly and then move 100 points to the right over 1 second. D) The squareView will move 100 points to the right and change its background color to blue simultaneously over 1 second. E) The squareView will move 100 points to the right over 1 second, and the background color will change to blue after 1 second.
	UI Responder Chain UI Views Interaction.	iOS	Medium	3 mins	Solve
Consider the following iOS (Swift) code snippet: When the user taps on the CustomButton, what will be the output? Note that UIButton is a subclass of UIControl by default. A) Only "CustomButton touchesBegan" will be printed. B) "CustomButton touchesBegan" and "CustomView touchesBegan" will be printed. C) "CustomButton touchesBegan", "CustomView touchesBegan", and "ViewController touchesBegan" will be printed. D) "CustomButton touchesBegan" and "ViewController touchesBegan" will be printed. E) No output will be printed.
	ViewController Buggy Code	iOS	Medium	3 mins	Solve
Here's two different ways to write the same code in iOS (Swift): Which of the following statements are correct?
	Data Provider DispatchQueue Closures Asychronous operations.	Swift	Medium	3 mins	Solve
Consider the following code snippet: What will be printed after the code execution?
	Property Observers OOPs	Swift	Medium	2 mins	Solve
Consider the following Swift code snippet: What does the code print after execution? A) 800, -100, 80, 80 B) 800, 800, 80, 72 C) 1000, 800, 100, 72 D) 800, 800, 80, 80 E) 800, 0, 80, 80
	Class Destructor OOPs	Swift	Medium	2 mins	Solve
What does the following Swift code output?
	Defer blocks	Swift	Easy	2 mins	Solve
What does the following Swift code output?
	Lazy Variables	Swift	Easy	2 mins	Solve
What does the following Swift code output?
	Registration Queue Logic Queues	Coding	Easy	30 mins	Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount. For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition. ⚠️⚠️⚠️ Note: - The first line of the input is the length of the array. The second line contains all the elements of the array. - The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function. - You need to "print" the final result (not return it) to pass the test cases. For the example discussed above, the input will be: 5 20 70 -40 30 -10 Your code needs to print the following to the standard output: 20 70 30 -40 -10
	Visitors Count Strings Logic	Coding	Medium	30 mins	Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. Example: Input: WWMMWWCCC Expected Output: 4W3C2M Explanation: ‘W’ has the highest count, then ‘C’, then ‘M’. ⚠️⚠️⚠️ Note: - The input is already parsed and passed to a function. - You need to "print" the final result (not return it) to pass the test cases. - If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’. - If any of them have the same count, the output should follow this order - M, W, C.

Reason #4

1200+ customers in 75 countries

With Adaface, we were able to optimise our initial screening process by upwards of 75%, freeing up precious time for both hiring managers and our talent acquisition team alike!

Brandon Lee, Head of People, Love, Bonito

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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment iOS Online Test in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Science behind Adaface tests

Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the iOS Online Test from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

Reason #7

Detailed scorecards & benchmarks

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Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

Reason #9

Advanced Proctoring

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About the iOS (Swift) Assessment Test

Why you should use Pre-employment iOS (Swift) Online Test?

The iOS Online Test makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

Ability to write clean and efficient Swift code
Knowledge of iOS app development using Swift
Proficiency in using views and controllers in iOS applications
Understanding of variables and data types in Swift
Experience with control flow statements in Swift
Expertise in creating and using functions in Swift
Familiarity with arrays and collections in Swift
Understanding of optionals and their usage in Swift
Knowledge of creating and working with classes and objects in Swift
Proficiency in memory management techniques in iOS development
Ability to handle errors and debug Swift code

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the iOS (Swift) Online Test?

Swift Programming
Swift programming language is a powerful and modern language used for developing iOS applications. It provides a concise and expressive syntax, which makes code easier to read and maintain. Testing candidates on Swift programming ensures that they have a good understanding of the language and can write clean and efficient code.
iOS Basics (Swift)
iOS basics in Swift covers the fundamental concepts and principles of iOS development. It includes topics such as creating user interfaces, managing application lifecycles, and utilizing built-in iOS features. Candidates with a strong grasp of iOS basics are equipped to build robust and user-friendly applications on the iOS platform.
Views and Controllers
Views and controllers are crucial components in iOS development. Views are responsible for presenting the user interface and receiving user input, while controllers handle the logic and behavior of the application. Assessing candidates on views and controllers ensures that they have the skills to design and implement well-structured and interactive interfaces.
Variables and Data Types
Variables and data types are essential concepts in programming. Understanding variables allows developers to store and manipulate values, while data types define the kind of values that can be stored. Testing candidates on variables and data types ensures that they are proficient in handling different data and can effectively manage memory resources in their applications.
Control Flow
Control flow refers to the order in which statements are executed in a program. It includes concepts such as conditional statements, loops, and branching. Evaluating candidates on control flow helps determine their ability to implement logical and efficient algorithms, ensuring that their code executes correctly and efficiently.
Functions
Functions are reusable blocks of code that perform specific tasks. They allow developers to organize their code and make it more modular and maintainable. Assessing candidates on functions ensures that they can write well-structured and efficient code, enabling them to solve complex problems and build scalable applications.
Arrays and Collections
Arrays and collections are used to store and manage multiple values. They provide a way to organize and manipulate data efficiently. Testing candidates on arrays and collections ensures that they can work with complex data structures, enabling them to handle large amounts of data in their applications.
Optionals
Optionals are a feature in Swift that allows for the representation of both a value and the absence of a value. They provide a safe and concise way to handle scenarios where a value may be missing or uncertain. Assessing candidates on optionals ensures that they have a solid understanding of handling optional values, reducing the likelihood of runtime errors and improving code reliability.
Classes and Objects
Classes and objects are fundamental concepts in object-oriented programming. Classes define the blueprint for creating objects, while objects are instances of classes. Evaluating candidates on classes and objects ensures they can design and implement well-structured and reusable code, fostering code reusability and maintainability.
Memory Management
Memory management is the process of managing computer memory resources to ensure efficient utilization and prevent memory leaks. It involves allocating and deallocating memory when needed, as well as handling reference counting and memory cleanup. Testing candidates on memory management ensures that they can write memory-efficient code, minimizing resource consumption and improving application performance.
Error Handling and Debugging
Error handling and debugging are essential skills for any developer. Error handling involves anticipating and handling errors that may occur during program execution, while debugging is the process of identifying and fixing issues in code. Assessing candidates on error handling and debugging ensures that they can effectively troubleshoot and resolve issues, ensuring the stability and reliability of their applications.
Networking
Networking is a critical aspect of many iOS applications, enabling communication with remote servers and APIs. It involves sending and receiving data over the internet and handling network-related tasks such as authentication and encryption. Evaluating candidates on networking ensures that they have the knowledge and skills to implement secure and efficient network communication in their applications.
Core Data
Core Data is a framework used for data persistence in iOS applications. It provides an object-oriented approach to managing and persisting application data, including support for data modeling, data storage, and query execution. Testing candidates on Core Data ensures that they can effectively implement data storage and retrieval, enabling them to build robust and scalable data-driven applications.
Testing and Debugging
Testing and debugging are critical phases in software development, ensuring the quality and stability of applications. Testing involves verifying that the application behaves as expected under various scenarios, while debugging involves identifying and fixing issues in the code. Assessing candidates on testing and debugging ensures that they can effectively validate and troubleshoot their applications, delivering high-quality and reliable software.
Full list of covered topics
The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for iOS Online Test to be based on.
Swift Syntax
Swift Functions
Swift Variables
Swift Control Flow
Swift Arrays
Swift Collections
Swift Optionals
Swift Classes
Memory Management in iOS
Error Handling in iOS
Debugging in iOS
Networking in iOS
Core Data in iOS
iOS Basics
Views and Controllers in iOS
iOS Testing
Swift Data Types
Swift Operators
Swift Closures
Swift Inheritance
Swift Protocols
Swift Extensions
Swift Initialization
Model-View-Controller (MVC)
Auto Layout
Xcode IDE
SwiftUI
Cocoa Touch Framework
Interface Builder
Storyboards
Navigation Controller
Table View
Collection View
Alerts and Action Sheets
Gesture Recognizers
User Defaults
JSON Parsing
URL Session
Core Animation
Auto-Release Pool
Grand Central Dispatch
SQLite
Unit Testing in iOS
UI Testing in iOS
Code Review
App Store Submission
App Localization
Push Notifications
Keychain Access
Background Execution
Debug Symbols
App Signing
App Distribution
App Store Provisioning

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What roles can I use the iOS (Swift) Online Test for?

iOS Developer
Swift Developer
Mobile Developer

How is the iOS (Swift) Online Test customized for senior candidates?

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like

Experience with networking in iOS applications
Knowledge of using Core Data for data persistence in iOS
Expertise in testing and debugging iOS applications
Understanding of key iOS design patterns and best practices
Experience in working with UIKit framework in iOS development
Familiarity with auto layout and constraints in iOS app design
Proficiency in using Core Animation and Core Graphics in iOS
Ability to work with push notifications and background tasks in iOS
Experience with integrating third-party libraries and frameworks in iOS
Knowledge of localization and internationalization in iOS development
Proficiency in working with Swift Package Manager and CocoaPods

The coding question for experienced candidates will be of a higher difficulty level to evaluate more hands-on experience.

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The hiring managers felt that through the technical questions that they asked during the panel interviews, they were able to tell which candidates had better scores, and differentiated with those who did not score as well. They are highly satisfied with the quality of candidates shortlisted with the Adaface screening.

85%

reduction in screening time

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iOS (Swift) Hiring Test FAQs

Can I combine multiple skills into one custom assessment?

Yes, absolutely. Custom assessments are set up based on your job description, and will include questions on all must-have skills you specify. Here's a quick guide on how you can request a custom test.

Do you have any anti-cheating or proctoring features in place?

We have the following anti-cheating features in place:

Non-googleable questions
IP proctoring
Screen proctoring
Web proctoring
Webcam proctoring
Plagiarism detection
Secure browser
Copy paste protection

Read more about the proctoring features.

How do I interpret test scores?

The primary thing to keep in mind is that an assessment is an elimination tool, not a selection tool. A skills assessment is optimized to help you eliminate candidates who are not technically qualified for the role, it is not optimized to help you find the best candidate for the role. So the ideal way to use an assessment is to decide a threshold score (typically 55%, we help you benchmark) and invite all candidates who score above the threshold for the next rounds of interview.

What experience level can I use this test for?

Each Adaface assessment is customized to your job description/ ideal candidate persona (our subject matter experts will pick the right questions for your assessment from our library of 10000+ questions). This assessment can be customized for any experience level.

Does every candidate get the same questions?

Yes, it makes it much easier for you to compare candidates. Options for MCQ questions and the order of questions are randomized. We have anti-cheating/ proctoring features in place. In our enterprise plan, we also have the option to create multiple versions of the same assessment with questions of similar difficulty levels.